By Julia Banim The Princess of Wales bravely sat alone as sheannounced her cancer diagnosis in a moving video message. Prince William, who Kate thanked for providing comfort in her hour of need, did not join her in the video, but no doubt supported her from the sidelines as his anxious yet determined wife addressed the nation solo. In her address to the country, Kate described her ordeal as ‘an incredibly tough couple of months for our entire family’. And body language expert Judi James has shed some light on the future King’s body language, and the changes she’s noticed that hint at his inner…